Diffraction Patents (Class 359/558)
  • Patent number: 10867407
    Abstract: Multiple cameras are coupled to a camera rig. Multiple diffractive optical elements (DOEs) are coupled to a DOE prop. Each camera is positioned in an eye box of a DOE and takes an image when the cameras are positioned at a first position, a second position and a third position relative to the DOEs. Three images taken by a each camera at each one of the first position, the second position and third position. The images are transmitted to a processor coupled to the camera rig. For each image, the processor identifies data pairs, each data pair including pixel coordinates of an intensity peak in the image and virtual light source produced by the diffractive optical element that corresponds to the intensity peak, and determines extrinsic parameters of the cameras using the identified data pairs for each image.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 15, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Zhiheng Jia, Etienne Gregoire Grossmann, Hao Zheng
  • Patent number: 10852460
    Abstract: There is provided a diffraction optical element which comprises a base material, and in which a first resin layer having a diffraction grating shape and a second resin layer are laminated on the base material. The diffraction grating shape forms a plurality of concentric annular sections when planarly viewed from a lamination direction of the diffraction optical element. The second resin layer comprises a first portion and a second portion, and the first portion is provided on a first annular section of the first resin layer. The second portion is continuously provided from above the first portion to above a region including a periphery of the first resin layer. A difference between a refractive index of the second portion on a center of the first annular section and a refractive index of the second portion on a circumference of the first annular section is within 0.0005.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: December 1, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenichi Iwata
  • Patent number: 10837765
    Abstract: Apparatus for structured light scanning. The structured light includes one or more projected lines or other patterns. At least two independent emitters emit light for each projected line or pattern. Typically the at least two independent emitters are arranged in a row. The apparatus also includes a pattern generator for causing light from respective emitters of a given row to overlap along a pattern axis to form a projected pattern.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: November 17, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Guy Raz, Nadav Grossinger, Nitay Romano
  • Patent number: 10832429
    Abstract: A device and method for obtaining depth information from a light field is provided. The method generating a plurality of epipolar images from a light field captured by a light field acquisition device; an edge detection step for detecting, in the epipolar images, edges of objects in the scene captured by the light field acquisition device; for each epipolar image, detecting valid epipolar lines formed by a set of edges; and determining the slopes of the valid epipolar lines. In a preferred embodiment, the method extend the epipolar images with additional information of images captured by additional image acquisition devices and obtain extended epipolar lines. The edge detection step calculates a second spatial derivative for each pixel of the epipolar images and detects the zero-crossings of the second spatial derivatives.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: November 10, 2020
    Assignee: PHOTONIC SENSORS & ALGORITHMS, S.L.
    Inventors: Jorge Vicente Blasco Claret, Carles Montoliu Alvaro, Arnau Calatayud Calatayud, Leticia Carrion, Adolfo Martinez Uso
  • Patent number: 10795160
    Abstract: A near eye optical display includes a waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler is configured to receive collimated light from a display source and to cause the light to travel within the waveguide via total internal reflection between the first surface and the second surface to the fold grating; the fold grating is configured to provide pupil expansion in a first direction and to direct the light to the output grating via total internal reflection between the first surface and the second surface; and the output grating is configured to provide pupil expansion in a second direction different than the first direction and to cause the light to exit the waveguide from the first surface or the second surface.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: October 6, 2020
    Assignees: Rockwell Collins, Inc., Digilens Inc.
    Inventors: James H. Stanley, Jonathan David Waldern, Milan Momcilo Popovich, Alastair John Grant, Steven J. Robbins
  • Patent number: 10777780
    Abstract: A battery or an accumulator including an anode case, an anode situated inside the anode case, a cathode case joined to the anode case, a seal sealing the cathode case to the anode case, a cathode situated inside the cathode case between the anode and the cathode case, and a membrane between the anode and the cathode. An outer surface of the battery includes at least one marking.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 15, 2020
    Assignee: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
    Inventors: Yves Burri, Michael Stalder, Jean-Claude Martin
  • Patent number: 10761320
    Abstract: An optical stack including a periodically varying optical film layer and a grating assembly for reducing moiré is described. The grating assembly includes first and second layers where an interface between the first and second layers define a grating having a peak to valley height and an index contrast. The index contrast multiplied by the peak to valley height may be between 150 nm and 350 nm and the grating has a pitch in the range of 2 micrometers to 50 micrometers. Each of the first and second layers may be viscoelastic or elastomeric adhesive layers, crosslinked resin layers, or soluble resin layers.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 1, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Brett J. Sitter, Matthew M. Philippi, Mary M. Pichotta, Chi Zhang, Daniel W. Hennen, Gary T. Boyd, Michael E. Lauters
  • Patent number: 10746907
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to grating couplers with structured cladding and methods of manufacture. A structure includes: a grating coupler in a dielectric material; a back end of line (BEOL) multilayer stack over the dielectric material; and a multi-layered cladding structure of alternating materials directly on the BEOL multilayer stack.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: August 18, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ajey Poovannummoottil Jacob, Yusheng Bian
  • Patent number: 10739558
    Abstract: The present invention provides a camera optical lens, comprising a lens group having a plurality of lens units and an aperture stop; wherein one of the lens units is provided with a coding surface having a wavefront coding surface near the aperture stop. Due to the wavefront coding surface, the aspherical surface can modulate the distribution of optical path of the camera optical lens.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: August 11, 2020
    Assignee: AAC Optics Solutions Pte. Ltd.
    Inventors: Xiaonan Zhao, Rongbao Shi
  • Patent number: 10718932
    Abstract: An optical system comprising trapping optics for forming an optical trap using counter propagating beams of light and light sheet imaging optics for light sheet imaging a particle, for example a cell, that is positioned in the optical trap, wherein the wavelength of the counter propagating beams of light and the wavelength of the light used for light sheet imaging are non-interfering.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: July 21, 2020
    Assignee: UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
    Inventors: Zhengyi Yang, Kishan Dholakia
  • Patent number: 10705314
    Abstract: A collimator lens system includes a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the system in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a negative focal power; the third lens is of a positive focal power, and an image side surface thereof is convex; optical centers of all the lenses are arranged along a same straight line, the system meets following formulas: f12>f3; (dn/dt)1<?50×10?6/° C.; (dn/dt)2<?50×10?6/° C.; (dn/dt)3>?10×10?6/° C., where f12 represents a combined focal length of the first and second lenses, f3 represents a focal length of the third lens, and (dn/dt)1, (dn/dt)2, and (dn/dt)3 represent change rates of refractive indices of the first lens, the second lens and the third lens with temperature, respectively.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: July 7, 2020
    Assignee: JIANGXI LIANCHUANG ELECTRONIC CO., LTD.
    Inventors: Xuming Liu, Kemin Wang, Jiyong Zeng, Haojie Zeng, Yumin Bao, Weijian Chen
  • Patent number: 10684450
    Abstract: An annular optical element includes a first side surface, a second side surface, an outer annular surface and an inner annular surface. The outer annular surface connects the first side surface and the second side surface, and surrounds a central axis of the annular optical element. The inner annular surface connects the first side surface and the second side surface, surrounds the central axis, and is closer to the central axis than the outer annular surface is to the central axis. The inner annular surface includes a plurality of protrusion circles surrounding the central axis and arranged along a direction from the first side surface towards the second side surface. Each of the protrusion circles includes a plurality of protrusion structures and a plurality of separation structures, and the protrusion structures and the separation structures are alternately arranged to surround the central axis.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: June 16, 2020
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Jung-Lieh Tsai, Ming-Ta Chou
  • Patent number: 10677969
    Abstract: Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.
    Type: Grant
    Filed: March 5, 2016
    Date of Patent: June 9, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Robert D. Tekolste, Michael A. Klug, Paul M. Greco, Brian T. Schowengerdt
  • Patent number: 10646105
    Abstract: The present invention is directed to an achromatic endoscope which employs a diffractive microlens. Along with a broadband rotary joint and a custom 800 nm SD-OCT system, ultrahigh-resolution 3D volumetric imaging over a large area becomes possible. The diffractive microlens can be used directly with a GRIN lens, making the endoscope design simpler and cost effective. Preliminary ex vivo 3D intraluminal imaging was performed with the endoscope in conjunction with a home-built broadband rotary joint and a spectral-domain OCT system, demonstrating the performance of the diffractive endoscope. Considering the miniature OCT imaging probe is the required component for using the OCT technology in internal organs, the proposed approach will have a broad impact on endoscopic OCT imaging by improving OCT resolution in any applications that involve a miniature OCT probe, as intravascular OCT imaging, gastrointestinal (GI) tract imaging, airway imaging etc.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: May 12, 2020
    Assignee: The Johns Hopkins University
    Inventors: Xingde Li, Anqi Zhang, Jiefeng Xi
  • Patent number: 10649221
    Abstract: An optical processing apparatus includes a light source, a condensing lens, and a light shield. The light source emits a light. The condensing lens converts a light emitted from the light source into a Bessel beam and condenses the light onto a surface of an object. The light shield shields an outer edge portion of the light in a cross section of a direction orthogonal to the optical axis of the light. The light shield may shield the outer edge portion of the light after entering the condensing lens and before condensing onto the surface of the object in the cross section of the direction orthogonal to the optical axis of the light.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: May 12, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventor: Asato Tamura
  • Patent number: 10634919
    Abstract: Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical device comprises an optical waveguide including a volume of optically transparent material having a first longitudinal surface positioned opposite a second longitudinal surface across a width of the volume, an in-coupler, a liquid crystal out-coupler, and a controller to modulate a refractive index of the liquid crystal out-coupler. Light is in-coupled into the waveguide and is propagated along a length of the waveguide by total internal reflection between the longitudinal surfaces before being out-coupled by the liquid crystal out-coupler on a path that is dependent on the modulated refractive index of the liquid crystal out-coupler. In this way, light signals can be steered to create an image and/or to move an exit pupil of an image. WHUDs that employ such optical waveguides are also described.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: April 28, 2020
    Assignee: North Inc.
    Inventors: Stefan Alexander, Douglas Raymond Dykaar, John Otto Vieth, Timothy Paul Bodiya
  • Patent number: 10545335
    Abstract: Provided is an optical system comprising a cemented lens including a positive lens, a negative lens, and an optical element cemented to the positive lens and the negative lens in which the optical element is made of an ultraviolet curing resin. An internal transmittance at a wavelength of an ultraviolet ray at which the ultraviolet curing resin is cured per thickness of 10 mm of a material for a first lens which is arranged on an object side out of the positive lens and the negative lens, and a minimum value and a maximum value of a thickness of the first lens in an optical axis direction are appropriately set.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kenta Sudo
  • Patent number: 10429652
    Abstract: A waveguide display includes light sources, a source waveguide, an output waveguide, and a controller. Light from each of the light sources is coupled into the source waveguide. The source waveguide includes gratings with a constant period determined based on the conditions for total internal reflection and first order diffraction of the received image light. The emitted image light is coupled into the output waveguide at several entrance locations. The output waveguide outputs expanded image lights at a location offset from the entrance location, and the location/direction of the emitted expanded image light is based in part on the orientation of the light sources. Each of the expanded image light is associated with a field of view of the expanded image light emitted by the output waveguide.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 1, 2019
    Assignee: Facebook Technologies, LLC
    Inventor: Pasi Saarikko
  • Patent number: 10401632
    Abstract: A planar line generator including a first planar surface extending in a first direction, a second planar surface facing the first planar surface, and a beam splitter in front of the second planar surface, the beam splitter configured to output, from light incident thereon, an undeflected beam, a first beam deflected to a first side of the undeflected beam along the first direction, and a second beam deflected to a second side of the undeflected beam along the first direction, wherein the second planar surface includes a line diffuser configured to receive the undeflected beam, and first and second diffusers having a design different from the line diffuser, the first and second diffusers being configured to receive the first and second beams, respectively.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: September 3, 2019
    Assignee: FLIR SYSTEMS, INC.
    Inventors: Robert Hutchins, Alan D. Kathman
  • Patent number: 10356390
    Abstract: The three-dimensional microscopic imaging system includes: a microscope; a field diaphragm; a narrow-band filter, configured to perform narrow-band filtering; a beam-splitting grating, configured to duplicate a beam into beams with different angles; a lens array with different focal length, configured to perform different phase modulation to each beam with different angles; a micro lens array, configured to modulate the beams with different angles that pass through the lens array with different focal length respectively to different spatial locations at a back focal plane of the micro lens array respectively; and an image sensor configured to record an image corresponding to the modulated beams at the back focal plane of the micro lens array. The system has a simple structure, a cheap cost, and a relatively weak exciting light, and is suit for living samples, and has the adjustable intervals of imaging depths.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 16, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Qionghai Dai, Jijun He, Jiamin Wu
  • Patent number: 10281725
    Abstract: A light flux diameter expanding element includes a light guiding plate with a light input face and a light output face, and with a thickness of 0.2 mm to 0.8 mm; a diffraction grating on the input side; and a diffraction grating on the output side, and is provided so as to have the same grating period as that of the diffraction grating on the input side, in which a forming region of the diffraction grating on the input side is smaller than that of the output side, and a grating period of the diffraction grating on the input side is a period in which a small diffraction angle in diffraction angles of +1-st order diffracted light and ?1-st order diffracted light, which are diffracted in the diffraction grating on the input side, in the light guiding plate becomes larger than a critical angle of the light guiding plate.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 7, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Osamu Yokoyama
  • Patent number: 10259178
    Abstract: Method for producing a lens array, which can prevent a weld from being formed in the peripheral part of a lens part and suppress increase of a work time of a transfer mold, and a molding mold. Since a master mold 10 of a molding mold has a plurality of linear groove parts 14e surrounding a plurality of cavity parts 12, resin hardly spreads to a corner part 14p where the adjacent linear groove parts 14e and 14e intersect each other and it is possible to prevent portions of the resin which have run over toward the adjacent groove parts 14e and 14e from spreading so as to come close to each other and being brought into contact with each other to create a weld trapping air bubbles.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: April 16, 2019
    Assignee: Konica Minolta, Inc.
    Inventors: Toshiyuki Imai, Daisuke Watanabe, Akira Sato
  • Patent number: 10234695
    Abstract: A method for producing an optical apparatus includes providing a pair of glass wafers. One or more diffractive optical elements (DOEs) are formed on one or more of the glass wafers. A spacer is positioned between the glass wafers so as to define a cavity containing the DOEs, and a hermetic seal that bonds the glass wafers together and seals the cavity is formed.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: March 19, 2019
    Assignee: APPLE INC.
    Inventors: Moshe Kriman, Adar Magen
  • Patent number: 10185065
    Abstract: An optically variable device and method of manufacturing the device is disclosed, the device including a plurality of zero-order diffraction grating elements some of which are modulated such that a coloured at least partially polarized image is visible to a person viewing the device, observing a first optically variable effect when the device is rotated about an axis substantially perpendicular to the plane, and a second optically variable effect when the device is viewed under polarized light and rotated about an axis substantially perpendicular to or parallel with the plane. The device is particularly suitable for security documents such as bank notes. Preferably, the first optically variable effect is produced by a change in brightness and/or color of the grating elements and the second optically variable effect may likewise be produced by a change in brightness and/or color of the grating elements.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: January 22, 2019
    Assignee: CLL Secure Pty Ltd
    Inventors: Phei Lok, Robert Arthur Lee
  • Patent number: 10182275
    Abstract: Disclosed herein is wavelength-division multiplexer with an internal optical signal tuned by a mounted signal pitch router. In particular, disclosed is a wavelength-division multiplexing (WDM) optical assembly including an optical signal router, a WDM filter, and a signal pitch router. The WDM filter has a wavelength selective surface positioned proximate the second side of the optical signal router. The signal pitch router has a transmissive surface positioned proximate to a side of the optical signal router, and a second reflective surface opposite the transmissive surface. A depth of the signal pitch router establishes and tunes a pitch of a routing optical path within the optical signal router. This provides for easier, faster, more reliable, and more cost effective manufacturing and assembly of the WDM optical assembly.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: January 15, 2019
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Qijun Xiao, Andy Fenglei Zhou
  • Patent number: 10175392
    Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: January 8, 2019
    Assignee: Brien Holden Vision Institute
    Inventors: Zeev Zalevsky, Alex Zlotnik, Ido Raveh, Shai Ben-Yaish, Ofer Limon, Oren Yehezkel, Karen Lahav
  • Patent number: 10156778
    Abstract: A display device includes an image projection device, a light guide plate, and a mask. The light guide plate includes deflectors arranged in a propagation direction of a light beam emitted from the image projection device and entering the light guide plate. Each deflector causes light beams to be emitted from an outgoing surface at angles different from each other in the propagation direction, the light beams emitted from locations different from each other or emitted in directions different from each other in a direction orthogonal to the longer direction of an incident surface in a displayed region of the image projection device. The mask shuts-off light beams other than a light beam directed toward a predetermined viewpoint among light beams emitted from the outgoing surface. The image projection device collimates light beams emitted from the region, in the direction orthogonal to the longer direction of the incident surface.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 18, 2018
    Assignee: OMRON Corporation
    Inventor: Masayuki Shinohara
  • Patent number: 10135076
    Abstract: A body-mountable device includes an electrochemical battery configured to provide power when exposed to an aqueous fluid. The aqueous fluid could be blood, sweat, tears, or some other bodily fluid. The electrochemical battery includes an anode that includes zinc metal and is configured to provide an electrical potential relative to a cathode when the anode and cathode are exposed to oxygen and an aqueous fluid. The electrochemical battery could provide power to electronics configured to measure a physiological parameter at a plurality of points in time, to record such measured parameters, to transmit such measured parameters to an external system, or to perform some other functions. Components of the body-mountable device could be embedded in a polymeric material configured for mounting to a surface of an eye. Components of the body-mountable device could be disposed on a flexible substrate configured for mounting to a skin surface.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: November 20, 2018
    Assignee: Verily Life Sciences LLC
    Inventor: Zenghe Liu
  • Patent number: 10088633
    Abstract: An optical waveguide is provided having at least first and second diffraction regions, the first diffraction region being arranged to diffract image-bearing light propagating along the waveguide so as to expand it in a first dimension and to turn the image-bearing light towards the second diffraction region, the second diffraction region being arranged to diffract the image-bearing light so as to expand it in a second dimension and to release it from the waveguide as a visible image. The first diffraction region is formed by first diffraction grating embedded within the waveguide, arranged to present a substantially similar profile to the image-bearing light when incident upon the grating from a given angle above or below the grating such that the polarization of the image bearing light is rotated by substantially similar amounts, but in opposite directions, by successive interactions with the first diffraction region.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 2, 2018
    Assignee: BAE SYSTEMS, plc
    Inventor: Stephen Paul Mason
  • Patent number: 10082684
    Abstract: A high contrast grating optical modulation includes an optical modulator at a front surface of a substrate to modulate received light. The high contrast grating optical modulation further includes a high contrast grating (HCG) lens adjacent to a back surface of the substrate opposite to the front surface to focus incident light onto the optical modulator. The substrate is transparent to operational wavelengths of the focused incident light and the modulated light.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: September 25, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Sagi Varghese Mathai, David A. Fattal, Michael Renne Ty Tan, Wayne Victor Sorin
  • Patent number: 9924144
    Abstract: The invention provides a light field illuminating method, device and system. The method includes: determining, based on position and angle of rays emitted from a projector and focal length of a lens, position and angle of projection rays obtained after the emitted rays being transmitted through a lens array; determining, based on position and angle of projection rays and light probe array of sampled scene, brightness value of projection rays; converting, based on brightness transfer function of projector, brightness value of projection rays into pixel value of projection input image, generating projection input image based on pixel value of projected input image; and performing light field illumination on target object with projection input image. A projector and a lens array are adopted to achieve light field illumination, so that pixel-level accurate lighting control can be achieved, and various complicated light field environments can be simulated vividly in practical scenario.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: March 20, 2018
    Assignee: BEIHANG UNIVERSITY
    Inventors: Qinping Zhao, Zhong Zhou, Tao Yu, Chang Xing
  • Patent number: 9874759
    Abstract: A method for scaling a structured light pattern and an optical device using the method are provided. The optical device includes a structured light generation unit and a conversion lens module. The conversion lens module is arranged between the structured light generation unit and a projection surface. The structured light generation unit outputs a structured light. After plural light beams of the structured light pass through the conversion lens module, the plural light beams are projected on the projection surface, so that a structured light pattern is formed on the projection surface. By controlling the conversion lens module to change traveling directions of the light beams of the structured light, the structured light pattern on the projection surface is correspondingly enlarged or shrunken.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: January 23, 2018
    Assignee: Everready Precision Ind. Corp.
    Inventors: Jyh-Long Chern, Chih-Ming Yen
  • Patent number: 9869924
    Abstract: A laser light application unit (2100) has a laser light source for applying laser light. A control information acquisition unit (2200) acquires control information indicating each of a plurality of directions in which an image is to be irradiated. A control unit (2300) controls an interface device (2000) such that the image is irradiated in each of the plurality of directions indicated by the control information. The laser light applied by the laser light application unit (2100) is incident on a first light collection unit (2400). The first light collection unit (2400) diffracts the incident laser light such that the laser light forms the image that is not similar to that at the time of incidence.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: January 16, 2018
    Assignee: NEC CORPORATION
    Inventor: Fujio Okumura
  • Patent number: 9857170
    Abstract: A waveguide apparatus includes a planar waveguide and at least one optical diffraction element (DOE) that provides a plurality of optical paths between an exterior and interior of the planar waveguide. A phase profile of the DOE may combine a linear diffraction grating with a circular lens, to shape a wave front and produce beams with desired focus. Waveguide apparatus may be assembled to create multiple focal planes. The DOE may have a low diffraction efficiency, and planar waveguides may be transparent when viewed normally, allowing passage of light from an ambient environment (e.g., real world) useful in AR systems. Light may be returned for temporally sequentially passes through the planar waveguide. The DOE(s) may be fixed or may have dynamically adjustable characteristics. An optical coupler system may couple images to the waveguide apparatus from a projector, for instance a biaxially scanning cantilevered optical fiber tip.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: January 2, 2018
    Assignee: MAGIC LEAP, INC.
    Inventors: Rony Abovitz, Brian T. Schowengerdt, Mathew D. Watson
  • Patent number: 9851570
    Abstract: An optical output coupler includes an uncoated plano-concave lens having a planar side and a concave side. An optical axis of the plano-concave lens is tilted at or near a Brewster angle relative to a beam axis. A first optical element is configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a first axis that is perpendicular to the beam axis. The first optical element is disposed between the planar side of the plano-concave lens and a second optical element. The second optical element is configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a second axis that is perpendicular to the beam axis, wherein the second axis is different from the first axis.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: December 26, 2017
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Michael von Dadelszen, Jeffery D. Kmetec
  • Patent number: 9791696
    Abstract: An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: October 17, 2017
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Scott Woltman, Steven John Robbins, R. Andrew Wall, Tuomas Vallius, Tapani Levola, Pasi Kostamo
  • Patent number: 9678355
    Abstract: In one embodiment, the optical device for generating an illumination pattern has a beam splitter and a pattern generator mounted in series and optically coupled one with the other. The beam splitter and the pattern generator are configured to cooperate one with the other in formatting an incident light beam into the illumination pattern. The illumination pattern has a plurality of diffraction patterns each resulting from a corresponding portion of the incident light beam being split from other portions of the incident light beam by the beam splitter. Each diffraction pattern has a zero-order beam. Each diffraction pattern overlaps with at least one of the other diffraction patterns and forms at least one overlapping region therewith, wherein the plurality of zero-order beams of the plurality of diffraction patterns are separated from one another in the illumination pattern.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: June 13, 2017
    Assignee: Osela Inc.
    Inventor: Francis Cayer
  • Patent number: 9618448
    Abstract: Metrology targets, optical systems and methods are provided, which enable metrology measurements of very small features, using resonance of illuminated radiation within periodical structures of the target, under appropriate illumination. Metrology targets comprise periodical structure(s) configured to resonate incident radiation and having a pitch defined by the grating equation with respect to configured parameters such as the selected diffraction order, refractive indices and the illumination's wavelength(s) and incidence angles. Possibly, the target may further comprise substructure(s) which are optically coupled with the resonating incident radiation in the periodical structure(s).
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: April 11, 2017
    Assignee: KLA-Tencor Corporation
    Inventor: Amnon Manassen
  • Patent number: 9503708
    Abstract: A projection system configured to emit patterned light along a projection optical axis includes: a diffractive optical element configured to perform a collimation function on the light emitted by the light emitter and to perform a pattern generation function to replicate the collimated light in a pattern, the pattern having substantially no collimated zero-order; and a light emitter configured to emit light toward the diffractive optical element, wherein the collimation function is configured to collimate the light emitted from the light emitter, and wherein the pattern generation function is configured to replicate the collimated light to produce the patterned light.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: November 22, 2016
    Assignee: Aquifi, Inc.
    Inventors: Aryan Hazeghi, Giulio Marin, Francesco Peruch, Carlo Dal Mutto, Abbas Rafii
  • Patent number: 9494767
    Abstract: Disclosed is an optical system. The optical system includes first to fourth lenses sequentially arranged from an object side to an image surface, and satisfies Equation 1, 1.5<n2<1.55, 20<v1<30, and 20<v3<30, ??Equation 1 in which n2 represents a refractive index of the second lens, v1 represents an abbe number of the first lens, and v3 represents an abbe number of the third lens.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: November 15, 2016
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Sang Hun Lee
  • Patent number: 9477015
    Abstract: A microlens array includes a cell, and P lenses (P is an integer of 4 or more) arranged in the cell, in which the apexes of the P lenses are arranged such that symmetry is at least partially broken, when viewed in plan view. In this way, it is possible to suppress diffraction caused by regularity in the lens shape in the cell. Accordingly, it is possible to realize a microlens with a high utilization efficiency of light.
    Type: Grant
    Filed: December 13, 2014
    Date of Patent: October 25, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Toru Nimura
  • Patent number: 9466490
    Abstract: A treatment system comprises an energy source that generates a energy beam that is emitted along an energy beam pathway. A beam section shaper is positioned along the energy beam pathway that receives an incident energy beam and modifies a section shape thereof to output a shape-modified energy beam. A beam intensity shaper is positioned along the energy beam pathway that receives an incident energy beam having a first intensity profile and outputs an intensity-modified energy beam having a second intensity profile, wherein the first intensity profile has a relative maximum average intensity at a center region thereof and wherein the second intensity profile has a relative minimum average intensity at a center region thereof.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 11, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sanghyun Kim, Chalykh Roman, Jongju Park, Donggun Lee, Seongsue Kim
  • Patent number: 9448430
    Abstract: A reflective liquid crystal display device includes a first substrate provided with a reflective electrode, a second substrate provided with a transparent electrode, a liquid crystal layer disposed between the first substrate and the second substrate, and an anisotropic scattering member formed on the second substrate. The anisotropic scattering member has first and second surfaces each including a first refractive index region and a second refractive index region having a refractive index different from that of the first refractive index region. A refractive index difference between the first refractive index region and the second refractive index region in the first surface is larger than that in the second surface. The anisotropic scattering member is disposed so that light enters from the first surface thereof and the light exits as scattered light from the second surface thereof. A phase difference is given to the light entered the anisotropic scattering member.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: September 20, 2016
    Assignee: Japan Display Inc.
    Inventors: Masashi Mitsui, Yoko Fukunaga
  • Patent number: 9366877
    Abstract: A planar diffractive optical element (DOE) lens is described herein. The planar DOE lens includes a substrate. The planar DOE lens further includes a first layer, the first layer being formed upon the substrate. The planar DOE lens further includes a diffractive optical element, the diffractive optical element being formed upon the first layer. The planar DOE lens further includes a second layer, the second layer being formed upon the first layer. The second layer is also formed over the diffractive optical element. The second layer encloses the diffractive optical element between the first layer and the second layer. The second layer includes a planar surface.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: June 14, 2016
    Assignee: Maxim Integrated Proeducts, Inc.
    Inventors: Patrick Tam, Joy T. Jones, Nicole D. Kerness, Arvin Emadi
  • Patent number: 9329407
    Abstract: Apparatus and methods to increase the depth of field in human vision in order to correct for loss in refocusing ability. Optics variations, such as changes in thickness, shape, or index of refraction of contact lenses, intraocular implants, or the shape of the cornea or eye lens, affect the phase, or wavefront, of the light perceived by the eye. The optics variations are chosen such that the resulting optical transfer function remains relatively constant over a desired range of object distances and pupil diameters.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: May 3, 2016
    Assignee: The Regents of the University of Colorado, a body corporate
    Inventors: W. Thomas Cathey, Jr., Robert H. Cormack
  • Patent number: 9310766
    Abstract: The present invention is in the field of security documents, more particularly in the field of security elements aimed to protect security documents against copying (illegal reproduction) and counterfeiting. It discloses a security element having a security feature which changes its visual appearance after irradiation with light, especially with UV light and at rotation and/or tilting. Security documents comprising said security element, as well as a method for producing said security element, are also disclosed.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 12, 2016
    Assignee: BASF SE
    Inventors: Thomas Bolle, Hans Reichert, Michelle Richert, Igor Zhurminsky, Marc Schnieper
  • Patent number: 9297937
    Abstract: A diffraction grating comprises a substrate with a set of protruding ridges and intervening trenches characterized by a ridge spacing ?, width d, and height h. The substrate comprises a dielectric or semiconductor material with a refractive index n1; the first substrate surface faces an optical medium with a refractive index n2 that is less than n1. Each ridge has a metal layer on its top surface of thickness t; at least a portion of the bottom surface of each trench is substantially free of metal. Over an operational wavelength range, ?/2n1<?<?/(n1+n2) can be satisfied. An optical signal can be incident on the diffractive elements from within the substrate at an incidence angle that exceeds the critical angle. The parameters n1, n2, ?, d, h, and t can be selected to yield desired polarization dependence or independence of the diffraction efficiency.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: March 29, 2016
    Assignee: LightSmyth Technologies, Inc.
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Patent number: 9297889
    Abstract: Various embodiments of TOF depth cameras and methods for illuminating image environments with illumination light are provided herein. In one example, a TOF depth camera configured to collect image data from an image environment illuminated by illumination light includes a light source including a plurality of surface-emitting lasers configured to generate coherent light. The example TOF camera also includes an optical assembly configured to transmit light from the plurality of surface-emitting lasers to the image environment and an image sensor configured to detect at least a portion of return light reflected from the image environment.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 29, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Joshua Mark Hudman, Prafulla Masalkar
  • Patent number: 9297988
    Abstract: A zoom lens includes, in order from an object side toward an image side: a first lens unit having a positive refractive power and provided with a positive lens; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power and provided with a diffraction plane of a diffraction optical element; a fourth lens unit having a positive refractive power to perform focusing; and an aperture stop between the second lens unit and the third lens unit. According to a change of magnification from a short focal end to a long focal end, the first lens unit is stationary, the second lens unit is moved to the image side, the third lens unit is moved to the object side, and the fourth lens unit is moved, and the positive lens satisfies the following condition formulas: 1.45<nd<1.65;??[1] 60.0<?d<95.0; and??[2] 0.005<Pg,F?(?0.001802×?d+0.6483)<0.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 29, 2016
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshifumi Sudoh
  • Patent number: 9288891
    Abstract: A conductive element includes: a substrate having a first wavy surface, a second wavy surface, and a third wavy surface; a first layer provided on the first wavy surface; and a second layer formed on the second wavy surface. The first and second layers form a conductive pattern portion. The first, second, and third wavy surfaces satisfy the following relationship: 0?(Am1/?m1)<(Am2/?m2)<(Am3/?m3)?1.8 (where Am1 is an average width of vibrations of the first wavy surface, Am2 is an average width of vibrations of the second wavy surface, Am3 is an average width of vibrations of the third wavy surface, ?m1 is an average wavelength of the first wavy surface, ?m2 is an average wavelength of the second wavy surface, and ?m3 is an average wavelength of the third wavy surface.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: March 15, 2016
    Assignee: SONY CORPORATION
    Inventors: Kazuya Hayashibe, Hiroshi Tazawa, Shunichi Kajiya